http://biblioteca.ubl.ac.cr/cgi-bin/koha/opac-search.pl?q=ccl=au%3AClark%2C%20Gordon%20Haddon&format=rss2 3 0 50 ISBN http://biblioteca.ubl.ac.cr/cgi-bin/koha/opac-detail.pl?biblionumber=21515 By Clark, Gordon Haddon. Philadelphia, Pa. : Prebyterian and Reformed Pub. Co., 1963 . 229 p. ; 23 cm.

]]> http://biblioteca.ubl.ac.cr/cgi-bin/koha/opac-detail.pl?biblionumber=21515 ISBN http://biblioteca.ubl.ac.cr/cgi-bin/koha/opac-detail.pl?biblionumber=4871 By Clark, Gordon Haddon.. Philadelphia, Pa. : Presbyterian and Reformed Pub. Co., 1965 . xiv, 284 p. ; 23 cm..

]]> http://biblioteca.ubl.ac.cr/cgi-bin/koha/opac-detail.pl?biblionumber=4871 ISBN http://biblioteca.ubl.ac.cr/cgi-bin/koha/opac-detail.pl?biblionumber=4872 By Clark, Gordon Haddon.. Philadelphia, Pa. : Presbyterian and Reformed Pub. Co., 1961 . vii, 241 p. ; 22 cm..

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